Trolley.



J. B. PHILLIPS.

I TROLLEY. APPLICATION FILED JANJB, 1909.

Patented Apr. 20, 1909.

JAMES B, PHILLIPS, or PORTLAND, MAINE.

TROLLEY;

g Specification of Letters Eatent.

Patented April 20, 1909.

Application filed. January 18 1909. Serial No. 472,770.

To all whom it may concern: I

Be it known that I, JAMES B. PHILILiPs, of Portland, in the county of Cumberland, State of Maine, have invented certain new and useful Improvements in Trolleys, of which the followin' is a specification,

My invention re tes to overhead trolleys such as are used on the booms of crane derricks, and the object of the invention is-to devise a trolley and trolley track suitable to be appxlied to the underside of the boom, and w ich will have themaximu m strength combined with simplicity and cheapness of construction.

My invention is intended to be used in crane derricks such as are used in handling lumber and for other heavy work.

In carrying out the above objects I construct a trolley withtwo side plates witha sheave pivoted between them and apair of trucks ivot'ed to the outside of each plate prefera ly at or near the'top. These two trucks are made to run on parallel rails sup ported by brackets secured to the rails in such a manner that the space between the rails is left free for the passage of the trolley.

I illustrate my invention by means of the accompanying drawing which Figure 1 is a side elevation of a trolley and trolley track constructed according to my invention, Fig. 2 is anend elevation of the boom and Fig. 3 is an end'elevation of a modified form.

In the drawing, A represents-the boom and B B are two parallel rails made preferably of flat bar iron with either square or round ed es. These rails are su ported in hangers C olted on the under si e of thebeam by through bolts 0 The rails are preferably put up in lengths butted end to end, the joints being formed at the hangers. The rails are secured to the hanger by resting on a projecting portion of thehanger and are secured by suitable bolts 6. The hanger has two arms which are somewhat separated and which are connected to the outsidev of the rails so that the s ace between the rails is left substantially cliaar.

The trolley is comp oted between two SldQ plates D the side plates and the sheave constituting a single osed of a sheave F pivv block. The plates D preferably hang. below the rails and extend above them and at or near the upper outside corner of each plate as here shown is pivoted a truck E by means of a pivot e, these trucks resting on the rails B and being adapted to run thereon. The trucks are grooved to conform to the edge of the rail. The trolley is thus supported upon the four trucks by which it is rolled alon the track and it is held laterally by means 0 the parallel rails. p

I have shown here the trolley as made double for convenience in doing certain work, that is, the trolleys are two in number placed end to end and fastened together b a plate (1 riveted to each iece but it is evi ent that the trolley may e made single with one sheave instead of two.

In Fig. 3 I have shown an alternative means of supporting the flat rail. In this figure 0 represents the hanger arm which is turned up at c to form a recess into which the rail sets. The rail being thus supported in the recess formed by the hanger will remain in place if desired without the use of bolts.

, A trolley constructed as described will stand greati strain, it may be easily constructed and erected- The top and sides of the boom are left free to be trussed and I strengthened.

In place of the four sup ortin trucks shown on each trolley it may e ma e with a single pair of trucks, one on each plate although the use of two trucks on each side serves to steady the trolley.

The herein described overhead trolle track and trolley consisting of a pair of paraf lel rails, hangers su porting the same, and a trolley oomposed of a pair of side plates, a sheave pivoted between the side plates and wheels adapted to run on said rails pivoted to the outside of the side lates.

In witness whereof have hereunto set my hand this 5th day of January, 1909.

JAMES B. PHILLIPS. 

